Lightly butter a 9" pie plate, then add the breadcrumbs - shake plate around to coat the sides and bottom, knocking out any excess. Scoop farro mixture into the plate, smoothing the top with an off-set spatula. Place into the oven and bake until the tart is just set and the top is lightly golden, about 35 to 45 minutes. Remove and place plate onto a wire rack to cool until it is warm to the touch before serving.